re PR tree-optimization/58958 (Wrong aliasing info for variable index)
2013-11-05 Marc Glisse <marc.glisse@inria.fr> PR tree-optimization/58958 gcc/ * tree-ssa-alias.c (ao_ref_init_from_ptr_and_size): Use get_addr_base_and_unit_offset instead of get_ref_base_and_extent. gcc/testsuite/ * gcc.dg/tree-ssa/pr58958.c: New file. From-SVN: r204389
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@ -1,3 +1,9 @@
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2013-11-05 Marc Glisse <marc.glisse@inria.fr>
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PR tree-optimization/58958
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* tree-ssa-alias.c (ao_ref_init_from_ptr_and_size): Use
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get_addr_base_and_unit_offset instead of get_ref_base_and_extent.
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2013-11-05 Marc Glisse <marc.glisse@inria.fr>
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2013-11-05 Marc Glisse <marc.glisse@inria.fr>
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* tree-ssa-alias.h (ranges_overlap_p): Handle negative offsets.
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* tree-ssa-alias.h (ranges_overlap_p): Handle negative offsets.
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@ -1,3 +1,8 @@
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2013-11-05 Marc Glisse <marc.glisse@inria.fr>
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PR tree-optimization/58958
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* gcc.dg/tree-ssa/pr58958.c: New file.
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2013-11-05 Marc Glisse <marc.glisse@inria.fr>
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2013-11-05 Marc Glisse <marc.glisse@inria.fr>
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* gcc.dg/tree-ssa/alias-26.c: New file.
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* gcc.dg/tree-ssa/alias-26.c: New file.
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@ -0,0 +1,12 @@
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/* { dg-do compile } */
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/* { dg-options "-O2 -fdump-tree-optimized" } */
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double a[10];
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int f(int n){
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a[3]=9;
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__builtin_memset(&a[n],3,sizeof(double));
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return a[3]==9;
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}
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/* { dg-final { scan-tree-dump " == 9" "optimized" } } */
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/* { dg-final { cleanup-tree-dump "optimized" } } */
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@ -566,7 +566,7 @@ ao_ref_alias_set (ao_ref *ref)
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void
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void
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ao_ref_init_from_ptr_and_size (ao_ref *ref, tree ptr, tree size)
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ao_ref_init_from_ptr_and_size (ao_ref *ref, tree ptr, tree size)
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{
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{
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HOST_WIDE_INT t1, t2, extra_offset = 0;
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HOST_WIDE_INT t, extra_offset = 0;
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ref->ref = NULL_TREE;
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ref->ref = NULL_TREE;
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if (TREE_CODE (ptr) == SSA_NAME)
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if (TREE_CODE (ptr) == SSA_NAME)
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{
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{
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@ -585,8 +585,17 @@ ao_ref_init_from_ptr_and_size (ao_ref *ref, tree ptr, tree size)
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}
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}
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if (TREE_CODE (ptr) == ADDR_EXPR)
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if (TREE_CODE (ptr) == ADDR_EXPR)
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ref->base = get_ref_base_and_extent (TREE_OPERAND (ptr, 0),
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{
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&ref->offset, &t1, &t2);
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ref->base = get_addr_base_and_unit_offset (TREE_OPERAND (ptr, 0), &t);
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if (ref->base)
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ref->offset = BITS_PER_UNIT * t;
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else
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{
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size = NULL_TREE;
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ref->offset = 0;
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ref->base = get_base_address (TREE_OPERAND (ptr, 0));
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}
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}
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else
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else
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{
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{
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ref->base = build2 (MEM_REF, char_type_node,
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ref->base = build2 (MEM_REF, char_type_node,
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